If you plan on upgrading to Windows 10 from XP or Vista, you will need to perform a clean install as there will be no upgrade path for these older platforms according to Microsoft.
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Download: Windows 10 build 9926
The latest data for desktop usage share shows that Windows 8 has gained during the last month while XP has lost nearly one percent, but Windows 7 still remains dominant.
VirtualXP will convert a Windows XP machine to a Virtual HD image (VHD) that can be loaded and run on Windows operating systems, such as Windows 8, 7, 2008, and 2012.